Had chest pains the night before at home(4/4/21). An hour after shift started on 4/5 started having chest pains again. Taken to hospital by ambulance. Sent home on 4/6/2021. Worked full shifts on 4/7, 4/8. Did not work on 4/9. Went to hospital on 4/9 where the determined employee was having a heart attack. Life flighted to Hospital where they performed surgery.